Elevator interlocking device



May 1., 1923.-

Y J. E..w. F GAL ELEVATOR INTERLOCKING DEVICE" Filed Oct. 19, 1921 zav switch plunger.

Patented May 1, 1923.

uniransraraa 'J'OHN E. w. roeAL, or QUINCY, lLLmois, AssIenoa ror oeAr-witmms 'siirn'rv DEVICES, :1vc., or QUINCY, I LmoIsncoaroRATIoN' OF ILLINOIS.

ELEVATOR mrnarooxinennvrcn Application filed October 19,1921: SerialQNo. 508,810. 1

To aZZwhom it may concern: v 1. 1

Be it knownthat I, JOHN E. W. FoGAL, a citizen of the United States, and a resident of Quincy, in the county of Adams and State of Illinois, have invented a new and useful Improvement in Elevator Interlocking-Devices, of which the following is a full, clear, and exact description. ,1 w

My invention. relates-to elevator interlocking devices, and it consists in: the combinations, constructionsand arrangements herein described and claimed.

An object of'my invention is to provide a combination latch for elevator doors and interlocking safety device which is simple in construction and thoroughly effective for the purpose intended. 1 A further object of my invention is toprovide a device of the character described in i which the electrical thoroughly insulated.

A further object of my invention is to vide a device of the character described which may be readily attached to the ordinary type of elevator door.

A further object of myv invention is to provide a device of the character described in which the safety device will operate when the latch is not engaged'even though the door of the elevator may be closed.

Other objects and advantages will appear in the following specification, and the novel points of contact are larly pointed out in the appended claims,

My invention is illustrated in the accompanying drawings forming part'of this application, in which i Figure 1 is a plan viewof my interlocking device alongthe line 1-1 of Figure2, Figure 2 is aside elevation of my'interlocking device, Figure 3 is a view of my interlocking device operatively applied, and

Figure 4 is, aperspective new of the In carrying out my invention, I make use of a cast metal base 1 having holes 2 therethrough for securing the base to the wall or like structure. On one side ofthe base 1 and adjacent the end thereof I provide an upwardly extending stationary cam member 3, the purpose of which will hereinafter be,v

described. At the opposite end of the'base 1 is an upwardly extending end wall 4 having an openingo therethrough to accommodate ,7 I 20 issecured to the bottom 19 of pro- I 8 maybe lead.

a'metal conduit 6through which wires 7 and I A casing!) of bakelite a are]; suitable material isIsecured to the base1 by means of screwsl 10. The casing 9 has two side walls 11 and 12 and'an end wall'13Lj The opposite end of the casingis' wall 14: which is placed ata shortdistanc'e from the ends of the'side valls 11 and 12, allowing the space 15 between the wall 14 and the end wall4 of the base. The sides and ends'of the casing "9'are all of the same height and areleveled so that a cover 16 v may be so placed to "close, the casing 9. The

cover'is arranged tobe held in placeby screws'17 which are received in threaded openlngs 18 of the two endwallsof the casing .9. A bottom 19 is provided; and forms an integral-part of the casing 9.

An upwardly extending metal contact post p the casing 9 and 1s provlded with a set screw 21. contacts arm 22. of spring-bronze or other suitablejmaterial is secured at one end to the end wall'l l of the casing9 by 'means ofa screw 23. A' Z-shaped metal strap 24 is placed between the spring member 22 and wardly extending ridge 26 on the "bottom 19 closed by an end the side of the end mu 14; and is also held of the'casing providesa rest as well as a member 20, as shown in dotted lines.

, guide for the movement of the spring mem- ,ber 22 toward and. away from the contact cam member 3a-plungera27 of bakeliteor other suitable'material which is flattened on one sldeto closelyengagean end of the cam 3. Thisplunger extends within the casing andis normallyheldvin the positiongshownfl in Figure 1 bymeans of thewpressureex- I erted by the spring contact member 22. The, shape of'the plunger 27 is clearly shown in Figure 4.- The surface 27 provides a means of limiting the outwardmovement. of "the plunger] A collar 29 on the, inner surface.

of the wallll provides ample means for guiding the plunger 27 inits movement to and away'from the surfac'e30of the wall'l-l;

Thewires 7 and 8 are arranged, one to; be

connected to the bindingscrew 25 and the other to the binding screw 21 and passagethrough the wall 14.] is provided by an opening 31.

Lil)

Referring now to Figure 3, the device above described is secured to the wall adjacent an elevator door 32. The door 32 is arranged to move upon a track bymeans of rollers 34. An i'ipwardly' extending bracket .is

from the cam member 8. This cam member 3 acts as a tooth andprovides means 'ofengagcment for the latch member 37.

From the foregoing description of the various parts. of the device, theop'eration there of may be readily understood. The wires 7 andS are'the ends provided by tapping of a continuous line contained-in the conduit 4-1 which runs from'one elevator doorto an other, and the current for supplying power to the elevator must flow through this line. Itwill therefore be evident that if the line is broken at any'point, the'ele vat-or cannot be moved.

\Vhen the door 32 of the elevator is closed, the latch 37 will slide up the inclined surface of the cam member 3 and drop downbehind the end 28 of that'membenthuslatching the door. The door 'cannot'be opened until the latch 37 is pulled down by such means asv provided by the hand lever 40.

When the latch 37 falls down over the end 28 of the member 3, it pushes with it the plunger 27 which in turn presses the spring contact member 22 against the'contact'post 20 and establishes an electric circuit between thewires 7 and 8.

It will therefore be seen that if anyof the doors are opened the elevator will not move, since the circuit supplying power fo'r'moving-the elevatorfis broken. a

I claim: '1. A device of the character described comprising a base, a cam surfaced'tooth integral withsaid base, a casing of insulating material carried by said base, apair of spaced apartc'ontact members supported on said casing, said casing having'ansope'ning through one side thereof adjacent one end of said cam tooth, and a plunger slidably mounted in said opening and adaptedto bring one of said contact members into engagement with the other of said contact members when pressure is brought to bear thereon.

2. A device of the character described comprising a base, a cam surfaced tooth integral with said base, a casing of insulating material carried by said base, a contact post carried by said casing, a spring contact member carried by said casing and normally out of engagement with said contact post, said casing having an opening therethrough adjacent one end of said cam tooth, and a plunger slidably disposed in said opening and adapted to move said spring contact member to engage said contact post when pressure is brought to bear thereon.

A. device er the character described,

comprising'a'base, a cam surfaced tooth. in-

. post when pressure is brought tobearthereon, and a plunger slidably disposed in said opening in said casing and arranged to engage said spring contact-member at one end andto project beyond the outer wall of said casingat the opposite end.

4. A device of the character described comprising a base, a cam surfaced tooth, a casing of insulating inaterialdisposed on said-base, said casing having an opening therethrough adjacent one end of said cam tooth, a contact postcarried by said casing, a spring contact member carried by said casing having its contact pointnormally spaced apart from said cont-act post, and a plunger slidably disposed in saidopening, said plunger having engagement atone end thereof with said spring contact member and having its other end projecting :out of said casing, whereby said spring contact member will be pressed into engagement with said contact post when pressure is brought to bear on said plun er.

JOHN E. Focal-i. 

